504 THE RABBIT OF POPOCATEPETL CHA
pointed out by Professor "W. INT. Parker.1 These differences ha^
led some to approve of its separation from the Hares into a genu
Oryetolagus. This animal is believed to be an introduced specie
and to have been brought by man into these islands. Its origins
home is the Spanish Peninsula, the south of France, Algiers, an
some of the Mediterranean islands. Mr. ."Lydekker thinks tha
the only other species of Eepus which can be considered to be
" Babbit " is the Asiatic L. hispidus.
Of Hares there are two species in this country. The Commo]
Hare, L* europaeus (the name L. timidus seems to be reall;
applicable to another species to be referred to presently), extend
all over Europe excepting the extreme north of Hussia anc
Scandinavia. It is not known in Ireland, and., curiously enough
attempts to acclimatise this animal in that island have failed—i
state of affairs which contrasts with the fatal ease with whicl:
the Habbit has been introduced into Australia. Ireland has
however, the Variable Hare, L. tim.idus (also called L. variabilis)
a species which is common in other parts of Europe, and whicl]
extends as far east as Japan. This species differs from its allj
by the fact that it often turns white in -winter with the ex-
ception of the black tips to the ears. In Ireland this change
does not always occur; but Mr. Barrett-Hamilton has commented
upon the fact that Hares of this species do change on Irish
mountains. It appears that in this animal the change from the
winter to the summer dress is accomplished by the actual casting
off of the "white hairs and their replacement by a fresh growth
of " blue" hairs. A similar change occurs in the American
Dr. Forsyth Major has noted the fact that the various species
of Hares can be distinguished by the condition of the furrows
upon the upper incisors. Thus two African species, Z. crawshayi
and L. whytei, are to be separated by the fact that in the former
the incisors are quite flat, whereas in L. whytei the groove is
more prominent and there is a second shallow furrow.
The genus HomerQlagus2 is quite a recent discovery. It
occurs on the slopes of Popocatepetl in Mexico; it has the
general aspect of the last genus, and is spoken of as a " Rabbit."
It inhabits runs in the long grass which clothes the sides of the
1 Proc. 2ool* Soc. 1881, p. 624.
2 Proc. JSioL JSoc. Washington* x. 1896, p. 169.